hp50g and power bank

[Dieter]

(03-27-2017 03:22 PM)pier4r Wrote:  The batteries are quite used. I would say they are 3+ years old and they were charged at least 20 times.

No problem at all for high-quality batteries, carefully charged in a processor-charger. With decent treatment a few hundred cycles are possible. But...

(03-27-2017 03:22 PM)pier4r Wrote:  recharger, a cheap one. It states output "2.8V 150 mA
batteries, beghelli (quite good in Italy) and energizer, 750 and 850 mAh.

OK, no further questions. ;-)

Try quality single-use batteries first (high power alkalines, maybe even Lithiums – if approved by HP). If this works, replace both your batteries and your charger by, say, a set of Panasonic Eneloops and a BC700 charger.

Dieter